Since retiring as a player, Mizerock has served as a minor league
manager, a
coach and
interim manager with the
Kansas City Royals. He is a two time winner of the
Dick Howser Award, awarded for outstanding contributions to the Royals organization ( and ). Mizerock's first managerial job came with the rookie league
Eugene Emeralds in . After leading the team to a 40-36 record, he was promoted to the Class A
Rockford Royals in , where he earned
Midwest League Manager of the Year honors. Mizerock moved to the
Carolina League's
Wilmington Blue Rocks in , where he was again named his league's manager of the year. In 1996, Wilmington won the league championship with Mizerock at the helm. He remained with Wilmington through before moving on to the
Wichita Wranglers in . Mizerock won the
Texas League title and was Minor League Manager of the Year with Wichita in . He spent the & seasons with the
Omaha Golden Spikes before getting his first major league coaching gig with the major league club in . He compiled 646 wins and 554 losses in his minor league managerial career. Mizerock was promoted from bullpen coach to interim manager of the Royals 23 games into the season when
Tony Muser was fired. His first game managing was against the
Detroit Tigers, who were being managed by
Luis Pujols on an interim basis. Pujols and Mizerock were teammates on the 1983 Houston Astros, competing for the back-up catcher job. After losing their first six games under Mizerock, the Royals won five of their next seven before he was replaced by
Tony Peña. In all, he led his team to a 5–8 record in thirteen games. 2002 was the first time in franchise history that Kansas City had lost 100 games. He stayed on as third base coach for the Royals until the end of , when he was assigned to be a roving instructor for the organization. He accepted a position to once again manage the high level Class A Wilmington Blue Rocks minor league team for the 2007 season. With his leadership, the team led the Carolina League in winning percentage, and returned to the playoffs. On October 23, 2007, Mizerock was named the Royals' bullpen coach for the 2008 season. His contract was not renewed following the season. Mizerock moved to the
Philadelphia Phillies organization in as hitting coach of their
Florida State League affiliate, the
Clearwater Threshers. He became the
assistant hitting coach of the
Philadelphia Phillies on December 18, 2013, and later became their third base coach. Mizerock was not retained by the Phillies following the 2015 season. He later accepted a position as a coach for Philadelphia's Short Season-A team, the
Williamsport Crosscutters for the 2016 season. Mizerock was named as the pitching coach for the
Clearwater Threshers of the 2018 season. ==References==